Eric didn't hear most of what the others said after the revelation. He was lost in his own thoughts, trying to weigh what he had just been told against what little he already knew. This stranger had influenced them all to meet at this particular place without them knowing it, and had hidden them from the eyes of dozens of people. Eric wasn't sure if the best magicians he'd ever encountered were capable of doing that. He had always known somewhere in the back of his mind that people like this man must have existed, but he had never predicted running into one like this. Now he was telling them they would be unable to leave. Eric had no reason to doubt it. There was one thing he did doubt though, and that was the idea that the world could have any need for a person like him. He had a feeling something big was happening based off some of the rumors he had heard in his search, but he didn't have the ability or the character to be a hero.
Eric's attention was brought back to the conversation when the jarhead began his tirade. He had assumed the guy was just acting like he knew more than everyone else to keep some semblance of control in this situation, but now it seemed like he was the real deal. Could any of the others here be experts? This could be exactly what Eric had been waiting for, even if it didn't come in the way he had expected. He didn't understand most of what the older man said, but he did get one thing out of the rant. This thing he had been anticipating, that the oddly-dressed man had just warned them about, was real- real enough to have a name.
This was it. He would never get a better chance to get over his miserable self and turn his life around. There was a calamity on the horizon and he was being told that he could help. If it turned out to be true that he would be unable to back out then that was all the better. He would have to wait and see if the girl who had run away when the commotion started came back- that would be his confirmation.
"Well, I'm in," he said, "for what that's worth. You can call me Eric."
Eric thought about the question the strange man had asked before he issued his ultimatum- about whether they believed in goodness and God. He never had, but he supposed it may be time for that to change too. He would need to be able to believe in anything if he was going to do this.